Wire-drawing apparatus



Patented Nov. 19, 1929 UNITED STATES PATENT orrics HERBERT OLOF OLSON, OF LA GRANGE PARK, ILLINOIS, ASSIGNOR TO WESTERN ELEC- TRIO COMPANY INCORPORATED, OF NEW YORK, N. Y., A CORPORATION OF NEW Yonx' WIRE-DRAWIN G APPARATUS Applicationfiled June 8, 1927, Serial No. 197,283. Renewed July 10, 1929.

This invention relates to wire'drawing apparatus, and more particularly to wire drawing apparatus provided with movable die holders.

In the practice of drawing wire through dies mounted in a fixed position, it has been found in some instances that extreme care must be exercised to prevent the formation of a deleterious deposit of metallic dust within the die opening, which might cause the production of rough non-uniform wire and result in considerable breakage. Maintaining the-dies in a fixed or stationary position also usually confines the wire to a localized portion of the capstan surface, tending to wear grooves therein and necessitate premature replacements of the capstan.

The primary object of the invention is to provide an improved, eflicient and simple 29 means for rapidly drawing wife of uniform cross-section.

In accordance with the general features of the invention, one embodiment thereof comprises a slidable rack and a plurality of pinions engaging the rack and equipped with wire drawing dies having offset draw holes.

Motion imparted to the dies by the rack and pinion mechanism causes the wire as it is drawn through the dies by a suitable capstan to travel backward and forward across the entire surface of each step in the capstan. The movement of the draw holes in a circular path causes a wiping action between the wire and the mouth of the die, thereby efiectively preventing any deleterious deposit of mud or metallic dust in the die opening.

These and other objects will be obvious from the following detailed description and the accompanying drawing, wherein Fig. 1 is an elevational view of a wire drawapparatus disclosing a representative emin bddiment of the invention;

' Fig. 2 is a plan sectional View taken on line {2-2 of Fig. 1;

Fig. 3 is a transverse vertical sectional view taken on line 3-3 of Fig. 2;

Fig. 4 is a fragmentary enlarged plan view of one of the die holders showing some of the positions taken by thedie during a complete cycle of the rotatable die holder, and

' drawing machine such as is disclosed in detail pulleys 29 above the rack 16 rotatably mount Fig. 5 is a fragmentary plan view of a modified form of pinion and die holder having a die receiving recess offset from the center.

Referring now to the drawing wherein like numerals have been employed to designate similar parts throughout the several views, it will be observed that the invention is illustrated as applied-to a well known type of wire in Patent 1,599,393 issued September 7, 1926 to H. Blount, only such portions of the machine being shown as are essential to a complete understanding of the invention. Pinions or die holders 10 having circular recesses 11 supportin dies 12 mesh with the teethof upper and ower horizontal racks 16 and 17 respectively. These racks 16 and 17 are supported by and slidable within guide ways 18 provided in a bracket 19 which is fastened to a machine frame 20 in any suita- 'ble manner, such as by screws 21.

Motion is imparted to the pinion die h'olders 10 through the reciprocation of the companion racks 16 and 17 which are'provided with pins or followers 22 lodged within the grooves of rotatable cams 23. These cams are supportedby bearings 24 secured to the machine frame 20 and are driven from a main drivin gear 25 through gears 26 and 27. The d1es 12 have their draw holes 13 ofiset from the center so that when the holders are actuated the draw holes 13 move in an arcuate path, as clearly shown by the dot and dash lines in the enlarged fragmentary plan view in Fig. 4.

In the operation of the disclosedapparatus a wire 28 is threaded through the draw holes 13 in the dies 12 and passed over idler ed upon the machine frame, and thence around a conventional drawing ca stan 30 located im mediately beneath rack 1 The capstan 30 and the racks 16 and 17 may have a suitable common driving means (not shown) within the machine frame. Upon rotation of the capstan 30 and the actuation of the rack and pinion mechanism, wire 28 is drawn through the dies 12, and at the same time the draw hoIes 13 move through an arcuate path thereby causing the wire 28 to wipe the conical periphery of the mouths of the draw holes 13 clean and free from injurious metallic deposits. This circular movement also causes the wire which is maintained in a relatively fixed position in the groove of the pulleys 29 to move backward and forward across the entire width of each step in the capstan 30, thus preventin the cutting of grooves therein.

A modified oralternative form of die holder is disclosed in Fig. 5. It will be observed that a pinion is provided having an eccentric die receiving recess. A die 31 may be inserted within this recess having a central draw hole, and when a wire is drawn therethrough and the holder is rotated the arcuate path traversed by the draw hole will result ina wiping action between the wire and the mouth of the die, as well as a backward and forward movement of the wire across the capstan step.

The apparatus disclosed in the drawing com- I prises a structure of simple and compact desi and enables the expeditious drawing of wire of very uniform cross-section.

What is claimed is:

1. In a wire drawing apparatus, a rotary die holder, a die supported thereby with a draw hole thereof eccentric in relation to the axis of the holder, and means for imparting rotation to the holder. 7

2. In a wire drawin apparatus, a rotary die holder, means for rawing wire through a supported die, a die supported by the holder with a draw hole thereof eccentric in relation to the axis of the holder to effect a wiping action between the die and the wire drawn therethrough and to reciprocate the wire across the face of the drawing means upon the holder and means for actuating the holder.

3. In a wire drawing apparatus, a rotary die holder, a die supported thereby having a draw hole ofi'set from the center of the die, and means for actuating the,holder to cause the draw hole in the die to move in a circular er comprising a pinion having an eccentric recess, a die supported'therein, a rack for acone rack being in staggered relationiwith respect to the holders actuated by an adjacent rack, a drawing die supported by each pinion having a draw hole eccentric w1th respect to the supporting pinifii, a cam mechanism .for

reciprocating the racks in synchronism, and,

means for actuating the cam mechanism.

7 In a wire drawing apparatus, a rotary holder having an eccentric support for a die, and means for rotating the holder.

8. In a wire drawing apparatus, a rotatable tuating the pinion, and means for reciprocat- I ing the rack.

5. In a wire drawing apparatus, a support, a plurality of rotatable die holders comprising pinions, 'a' rack slidable within the support for imparting simultaneous rotation to the pinions, a drawing die supported by each.

pinion having a draw hole eccentric with respect to the supporting pinion, and means tor reciprocating the rack.

6. In a wire drawing apparatus, a support, a plurality of horizontal y disposed parallel racks slidable in the support, a plurality of rotatable die holders comprising pinions actuated by the racks, the holders actuated by 

